You should def come out. Wanaka would be the place to go, heaps of prople migrate there in the winter. accomodation shouldnt be to hard if you get in early and if you get some flatmates it shouldnt be to expensive. you have the three fields to pick from (Snow Park, Treblecone and Cardrona) that are within 40min of wanaka and you can get a bus to all of them. also you should be able to get a job at a restaurent or bar or something if you get in early enough. so basically get there early and you should be good.
the only downsides are that food is pretty expensive compared to the cities.
if you want any more info just pm me